1) I'm only giving the corrections: - myDecel and leaderMaxDecel are the values of vType attribute 'decel' attribute for the respective vehicles. This is a static value corresponding to the maximum desired deceleration. Note, that other carfollow models may interpret the same value differently when they override the functions getSecureGap, brakeGap etc. - when calling brakeGap the headwayTime argument is sometimes myHeadwayTime and sometimes 0. See getSecureGap - ACCEL2SPEED and SPEED2DIST are used to compute changes in speed and distance for one simulation step which may different from 1s. The formulas are in src/utils/common/SUMOTime.h. DELTA_T is the step-length in milliseconds hence TS = DELTA_T/1000
2) see https://github.com/eclipse/sumo/blob/1c5cd080e83c7cad30f96a6c6b70bb4d80478bdb/src/microsim/MSLaneChanger.cpp#L767-L768 https://github.com/eclipse/sumo/blob/1c5cd080e83c7cad30f96a6c6b70bb4d80478bdb/src/microsim/MSLaneChanger.cpp#L798-L799 Am Mo., 13. Apr. 2020 um 14:37 Uhr schrieb Bae, Jong In <[email protected]>: > Hi, > > I have some questions on SUMO's 'getSecureGap' ( > https://github.com/eclipse/sumo/blob/3a3be608d2408d7cbf10f6bba939254ef439c209/src/microsim/cfmodels/MSCFModel.h#L333-L339) > and 'brakeGap' ( > https://github.com/eclipse/sumo/blob/3a3be608d2408d7cbf10f6bba939254ef439c209/src/microsim/cfmodels/MSCFModel.cpp#L77-L99 > ). > > <https://github.com/eclipse/sumo/blob/3a3be608d2408d7cbf10f6bba939254ef439c209/src/microsim/cfmodels/MSCFModel.cpp#L77-L99> > eclipse/sumo > <https://github.com/eclipse/sumo/blob/3a3be608d2408d7cbf10f6bba939254ef439c209/src/microsim/cfmodels/MSCFModel.cpp#L77-L99> > Eclipse SUMO is an open source, highly portable, microscopic and > continuous road traffic simulation package designed to handle large road > networks. It allows for intermodal simulation including ped... > github.com > > > 1. Could you verify the meaning of each argument of the two functions? > > *getSecureGap* > > - myDecel - current deceleration rate of the subject vehicle (the one > attempting to merge) > - leaderMaxDecel - current deceleration rate of the leading vehicle > (vehicle preceding to the lane change area) > > *brakeGap* > > - speed - current speed of the subject vehicle > - myHeadwayTime - Tau value of the subject vehicle (is this the same > as headwayTime argument?) > - leaderSpeed - current speed of the leader vehicle > - ACCEL2SPEED - is the formula available? (the time.h file only says > the formula as x/deltaT; what are these parameters?) > - SPEED2DIST - is the formula available? > > > 2. In the required gap equation = secureBackGap + subjectLength + > subjectMinGap + secureFrontGap, how are 'secureBackGap' and > 'secureFrontGap' determined in the 'getSecureGap'? > Is it simply using follower vehicle's deceleration and speed for > 'secureBackGap' and leader vehicle data for 'secureFrontGap'? > > Thank you in advance for your assistance. > > -James Bae > > _______________________________________________ > sumo-user mailing list > [email protected] > To unsubscribe from this list, visit > https://www.eclipse.org/mailman/listinfo/sumo-user >
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